Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
  • B04B—CENTRIFUGES
  • B04B9/00—Drives specially designed for centrifuges; Arrangement or disposition of transmission gearing; Suspending or balancing rotary bowls
  • B04B9/14—Balancing rotary bowls ; Schrappers
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
  • B04B—CENTRIFUGES
  • B04B5/00—Other centrifuges
  • B04B5/04—Radial chamber apparatus for separating predominantly liquid mixtures, e.g. butyrometers
  • B04B5/0407—Radial chamber apparatus for separating predominantly liquid mixtures, e.g. butyrometers for liquids contained in receptacles
  • B04B5/0414—Radial chamber apparatus for separating predominantly liquid mixtures, e.g. butyrometers for liquids contained in receptacles comprising test tubes
  • B04B5/0421—Radial chamber apparatus for separating predominantly liquid mixtures, e.g. butyrometers for liquids contained in receptacles comprising test tubes pivotably mounted
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
  • B04B—CENTRIFUGES
  • B04B9/00—Drives specially designed for centrifuges; Arrangement or disposition of transmission gearing; Suspending or balancing rotary bowls
  • B04B9/14—Balancing rotary bowls ; Schrappers
  • B04B9/146—Unbalance detection devices
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T74/00—Machine element or mechanism
  • Y10T74/21—Elements
  • Y10T74/2109—Balancing for drum, e.g., washing machine or arm-type structure, etc., centrifuge, etc.

Definitions

• the present invention relates, in general, to automatic balancing rotors for centrifuges
• centrifuges are apparatuses in which a rotor containing samples is rotated
• FIG. 1 is a sectional view showing a conventional automatic balancing rotor for
• a mechanism in which a lever central body 636 is horizontally moved according to a
• the lever moving mechanism includes a worm 662
• lever central body 636 having a rack 636a, which engages with the pinion 666.
• a pressure sensor 690 is provided under each rotational arm 632 to
• a wiring layer 562 is integrally coupled to a lower part of the rotor to receive an electrical signal from
• the pressure sensors 690 and transmit an electrical signal to the lever moving motor 652
• the samples may be excessively or incompletely separated. Furthermore, there is a predetermined minirnum limit in balancing the rotor due to
• an object of the present invention is to provide an
• weight can be longitudinally formed through nearly all of the rotor arm, a sufficient balance
• FIG. 1 is a sectional view showing a conventional automatic balancing rotor for
• FIG. 2 is a perspective view of an automatic balancing rotor for centrifuges
• FIG. 3 is an exploded perspective view of the automatic balancing rotor of FIG.2;
• FIG. 4 is a sectional view of the automatic balancing rotor taken along the line A-A
• FIG. 5 is an electrical block diagram of a centrifuge having the automatic balancing
• the present invention provides an
• automatic balancing rotor for a centrifuge including: a plurality of rotating arms having the
• the buckets may be supported in spaces defined between the rotating arms,
• each of the rotating arms may include a slot formed through the
• the balance weight may have an internal thread
• the balance weight moving means may be
• balance weight moving motor have: a balance weight moving motor; a worm axially coupled to the balance weight moving
• shaft is coaxiaUy coupled at an end thereof to the worm gear.
• the automatic balancing rotor may further include a reference position sensing
• FIG. 2 is a perspective view of an automatic balancing rotor for centrifuges
• FIG. 3 is an exploded perspective view of the automatic balancing rotor of FIG. 2.
• FIG. 4 is a sectional view of the rotor taken along
• embodiment of the present invention includes three rotor arms 29 which support a plurality of
• the automatic balancing rotor further includes a
• balance weight 15 which is provided in each of the rotor arms 29 to compensate for imbalanced
• the rotor arms 29 are formed by cutting
• the buckets 31 are disposed in the cut portions.
• the rotor arms 29 are
• a pair of bucket support pins 33 is provided on opposite
• each bucket 31 is
• the slot 29a has an elongated rectangular hole shape.
• the balance weight 15 have a hexahedral shape to prevent the
• Each balance weight moving means has a balance weight moving motor 5 which is
• the balance weight moving motor 5 is vertically disposed.
• the balance weight moving means further has a worm 7 which is axially coupled to an end of the output shaft of the balance
• the balance weight moving shaft 17 has an
• the balance weight moving means further has a worm gear 19 which is axially
• thrust bearing 21 and a radial bearing 23 which are coaxiaUy coupled to opposite ends of the
• a reference position sensor 13 preferably a limit switch, is required.
• reference position sensor 13 is provided at a predetermined position in each slot 29a.
• the reference position sensor 13 is mounted to a support bracket 11 which extends a
• the reference numerals 3 and 1 respectively denote a support frame
• the reference numeral 9 denotes a slot cover to cover an open upper end of each
• FIG. 5 is an electrical block diagram of the operation of a centrifuge having the
• a key input unit 110 to select and input various functions provided by the centrifuge
• construction of the centrifuge further includes a display unit 130 which displays information
• control unit 100 which controls
• balance weight moving unit 150 which moves the balance weight 17 by driving the balance weight 17
• balance weight moving motor 5 along the balance weight moving shaft 17 from an initial
• centrifuge further includes a signal connection unit 140 which connects a wiring connection
• balance weight moving unit 150 according to a sensing signal from the balance sensing unit
• the electrical construction of the centrifuge further includes a centrifugal separation
• the balance weight moving motor 5 may be any suitable balance weight moving motor
• a stepping motor which is able to precisely control its rotation angle.
• the balance weight moving motor 5 may be embodied by a servomotor.
• control unit 100 includes a balance weight moving distance calculating equation (see equation
• a user puts adaptors (not shown) containing samples in three buckets 31 supported by the bucket support pins 33 of the rotor arms 29. Thereafter, the user inputs a
• control unit 100 transmits the control command to the balance
• the weight measuring apparatus having a
• weight measuring sensor (not shown) measures the weight of the samples contained in the
• control unit 100 receives a signal about the weight of
• control unit 100 transmits a control command to the signal connection unit 140, thus driving
• control unit 100 first determines whether each
• balance weight 15 is placed at the initial reference position or not through a signal received
• control unit 100 transmits a control command to the
• balance weight moving unit 150 through the connected signal connection unit 140 to control
• balance weight 15 is advanced by the calculated distance along the balance weight moving
• control unit 100 transmits a control command to the balance weight moving unit 150 through
• control unit 100 continuously reads a signal from the reference position sensor 13 and
• the signal from the reference position sensor 13 indicates that the balance weight 15 reaches the
• control unit 100 immediately stops the control signal, which has
• the balance weight moving shafts 17, the balance weights 15 can compensate for imbalance
• control unit 100 After balancing the rotor, the control unit 100 transmits
• control unit 100 transmits a control command to the centrifugal separation drive unit 160 to
• the display unit 130 displays various kinds of
• centrifuge having the automatic balancing rotor of the present invention in the control unit 100,
• a vector value of a total centrifugal force of the balance weights 15 can be calculated
• weights 15 which compensates for or offsets the total centrifugal force vector of the buckets 31.
• a distance to move each balance weight 15 along each balance weight moving shaft 17 is
• the factor ⁇ denotes a rotating speed of
• the equation 1 is for a three-arm rotor.
• the equation 1 is for a three-arm rotor.
• reference position sensors 13 is disposed around an output shaft of the rotor drive motor 180.
• the wiring layer is removably connected to the wiring connection board (not
• moving motor 5 is axiaUy coupled to each worm 7 to move the associated balance weight 15
• the worm 7 engages with the associated worm gear 19 at an appropriate gear ratio. In such engagement of the worm 7
• the worm gear 19 can be driven by the rotation of the worm 7, but the
• the automatic balancing rotor for centrifuges according to the present invention is
• a two-arm swing rotor, a four-arm swing rotor or a swing rotor having
• five arms or more may be used in a centrifuge, in place of the three-arm swing rotor shown in
• gears or other gears may be used as a balance weight moving unit to control the movement of
• a multiple bearing may be used in the balance weight moving unit, in place of the

Landscapes

• Centrifugal Separators (AREA)

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ID=36090235

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Citations (5)

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• 2004
  • 2004-09-23 KR KR1020040076489A patent/KR100615630B1/ko active IP Right Grant
  • 2004-11-19 DE DE602004016538T patent/DE602004016538D1/de active Active
  • 2004-11-19 US US10/547,476 patent/US7285085B2/en not_active Expired - Fee Related
  • 2004-11-19 AU AU2004313215A patent/AU2004313215B2/en not_active Ceased
  • 2004-11-19 JP JP2005518110A patent/JP4440892B2/ja active Active
  • 2004-11-19 CA CA002520198A patent/CA2520198C/en not_active Expired - Fee Related
  • 2004-11-19 WO PCT/KR2004/003011 patent/WO2006033502A1/en active Application Filing
  • 2004-11-19 CN CNB2004800055935A patent/CN100455358C/zh not_active Expired - Fee Related
  • 2004-11-19 AT AT04821366T patent/ATE407741T1/de not_active IP Right Cessation
  • 2004-11-19 EP EP04821366A patent/EP1667799B1/en not_active Not-in-force
• 2006
  • 2006-10-13 HK HK06111283.7A patent/HK1089406A1/xx not_active IP Right Cessation

Patent Citations (5)

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